Hi there wondering if any one can help. The satnav on my RR Sport 2.7 HSE TDV6 has an intermittent fault whereby the screen freezes on start up. I am able to access the other touchscreen functions, settings, 4x4 etc. However when I switch back to the SatNav screen none of the on screen functions work. Curiously, I was on a long drive last week and after about 80 miles the SatNav suddenly burst into life with a message ‘No Nav’ at which point it worked normally, I was able to pullover and access the SatNav functions, key in a destination, and then resume my journey with guiding operative. It then worked for the next couple of startups, however after this it again started up with the SatNav functions frozen. Most of the time the SatNav seems to be stuck in the inoperative state. Kind Regards Paul.